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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of comparative physiology 167 (1990), S. 757-769 
    ISSN: 1432-1351
    Keywords: Ontogeny ; Auditory fovea ; Tonotopy ; Sexual dimorphism ; Rhinolophus rouxi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary This report describes the ontogenesis of tonotopy in the inferior colliculus (IC) of the rufous horseshoe bat (Rhinolophus rouxi). Horseshoe bats are deaf at birth, but consistent tonotopy with a low-to-high frequency gradient from dorsolateral to ventromedial develops from the 2nd up to the 5th week. The representation of the auditory fovea is established in ventro-mediocaudal parts of the IC during the 3rd postnatal week (Fig. 3). Then, a narrow frequency band 5 kHz in width, comprising 16% of the bat's auditory range, captures 50–60 vol% of the IC (Fig. 3c). However, foveal tuning is 10–12 kHz (1/3 octave) lower than in adults; foveal tuning in females (65–68 kHz) is 2–3 kHz higher than in males (62–65 kHz). Thereafter, foveal tuning increases by 1–1.5 kHz per day up to the 5th postnatal week, when the adult hearing range is established (Figs. 4, 5). The increase of sensitivity and of tuning sharpness of single units also follows a low-to-high frequency gradient (Fig. 6). Throughout this development the foveal tuning matches the second harmonic of the echolocation pulses vocalised by these young bats. The results confirm the hypothesis of developmental shifts in the frequency-place code for the foveal high frequency representation in the IC.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of comparative physiology 167 (1990), S. 771-784 
    ISSN: 1432-1351
    Keywords: Ontogeny ; Audition ; Vocalisation ; Sensorimotor interaction ; Rhinolophus rouxi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Horseshoe bats (Rhinolophus rouxi) were deafened in their 3rd–5th postnatal week. Subsequently their vocalisations were monitored to evaluate the impact of audition on the development of echolocation pulses. Hearing impairment affected the echolocation pulses as follows: the frequency of the constant frequency (CF) component was altered by between + 4 kHz and − 14 kHz, and the dominance of the second harmonic of the pulses was neutralised by a relative increase in intensity of the first and third harmonics. A second experiment focused on possible influences of acoustical self-stimulation with echolocation pulses on the establishment of auditory fovea representation in the inferior colliculus (IC). Frequency control of echolocation pulses was disrupted by larynx denervation. Thereafter, the bats produced multiharmonic echolocation signals (4–11 harmonics) varying in frequency. IC tonotopy, however, as monitored by stereotaxic electrophysiology, showed the same developmental dynamics as seen in control specimens (Fig. 10). Both experiments indicate that throughout postnatal development echolocation pulses are under auditory feedback control, whereas maturation of the auditory fovea and shifts in its frequency tuning represent an innate process. The significance of this postnatal development might be the adjustment of the vocal motor system of each bat to the frequency of its ‘personal’ auditory fovea.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 359 (1968), S. 67-77 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bis-phenylphosphino-methylpyridine-(2) (PhPMP) gives with NiII salts 1,2-chelates. The chloro and thiocyanato chelate have octahedral, the perchlorate a planar-quadratic structure. Coordination number 5 is discussed for the corresponding bromo and iodo complexes.CoII-1,2-chelates are also formed with PhPMP. The chloro, bromo, and thiocyanato complexes are all of high-spin type, having an octahedral structure. The chelates from CoII iodide and perchlorate show reduced paramagnetism. In Co(PhPMP)2(ClO4)2 one perchlorate group appears to have a monodentate ligand function.
    Notes: Bisphenylphosphino-methylpyridin-(2) (PhPMP) bildet mit Nickel(II)-Salzen Chelate vom 1,2-Typ. Dabei kommen dem Chloro- und Rhodanokomplex eine oktaedrische, dem Perchlorat eine planar-quadratische Struktur zu. Für den Bromo- und Jodokomplex wird die Koordinationszahl 5 diskutiert. Kobalt(II)-Verbindungen geben mit PhPMP gleichfalls 1,2-Chelate. Der Chloro-, Bromo- und Rhodanokomplex gehören dem High-spin-Typ an und besitzen eine oktaedrische Struktur. Die vom Kobalt(II)-jodid bzw. -perchlorat abgeleiteten Chelate zeigen reduzierten Paramagnetismus. Im Co(PhPMP)2(ClO4)2 fungiert das Perchlorat z. T. als einzähliger Ligand.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 407 (1974), S. 23-34 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Anomal Magnetically Behaviour of Diethylphosphino Methylpyridine-(2) Complexes of 3d IonsDiethylphosphino methylpyridine-(2) forms 1,2-complexes with nickel(II) and cobalt(II). In these complexes depending on the nature of anionic ligands which are present in addition, the central atoms have the coordination numbers 4, 5 or 6.“Ni(Et2PMP)2Cl2” and “Ni(Et2PMP)2Br” are magnetically anomal. They are inter-allogones, probably containing five-coordinate nickel(II) species of the low-spin and the high-spin type.The cross-over between high-spin and low-spin types of five-coordinate nickel(II) complexes, observed by Sacconi at the donor atom set N2P2Cl, has been verified. With five-coordinate cobalt(II) complexes this cross-over was observed at the same donor atom set.Et2PMP forms a diamagnetic, octahedral 1, 3-complex with iron(II) and a tetrahedral 1,2-complex with zinc(II).
    Notes: Diäthylphosphino-methylpyridin-(2) bildet mit Nickel(II)- bzw. Kobalt(II)-Salzen 1,2-Komplexe, in denen die Zentralatome je nach den zusätzlich vorhandenen anionischen Liganden die Koordinationszahlen 4, 5 oder 6 haben.„Ni(Et2PMP)2Cl2“ und „Ni(Et2PMP)2Br2“ verhalten sich magnetisch anomal und werden auf Grund ihres physikalischen Verhaltens als Interallogone angesprochen, die fünffach-koordinierte Nickel(II)-Spezies vom Low-Spin- und vom High-Spin-Typ nebeneinander enthalten.Der von Sacconi für fünffach-koordinierte Nickel(II)-Komplexe gefundene übergang von High-Spin- zu Low-Spin-Typen beim Haftatomsatz N2P2Cl konnte bestätigt werden. Für die fünffach-koordinierten Kobalt(II)-Komplexe wurde der übergang beim gleichen Haftatomsatz beobachtet.Mit Eisen(II) bildet Et2PMP einen diamagnetischen, oktaedrischen 1,3-Komplex, mit Zink(II) einen tetraedrischen 1,2-Komplex.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 61 (1989), S. 187-192 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 70 (1998), S. 1137-1138 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 71 (1999), S. 956-956 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 67 (1995), S. 1168-1168 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 62 (1990), S. 968-977 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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